XTS code is relying upon JBowssWS Native W3CEndpointReference feature which disappears in JBossWS 3.1.0

The XTS code relies upon method getAddress() of class W3CEndpointReference in the JBowssWS Native stack implementation. This method has been removed in JBowssWS Native 3.1.0 because the implemenation does not pass the TCK tests if it is included. So, the XTS code needs to identify another means of obtaining the address wrapped up inside a W3CEndpointReference.